TCDHA RADIOGRAPHY THEORY
CERTIFICATION EVALUATION COMPLETE
QUESTIONS AND ANSWERS GRADED A
PLUS
●● What is one of the main reasons that radiographs are considered an
important and necessary part of patient care?
Answer: Many dental diseases are typically discovered only through the
use of dental radiographs.
●● What does the nucleus of an atom contain?
Answer: Protons and neutrons
●● What are photons?
Answer: - bundles of energy without mass or weight
- bundles of energy that travel at the speed of light.
- they are a component of the particle concept of electromagnetic
radiation.
●● When contrasted with the use of 65 kV to 75 kV for dental x-rays,
the use of 85 kV to 100 kV produces _________ x-rays and __________
wavelengths
,Answer: The use of 85 kV to 100 kV for dental x-rays produces more
penetrating dental x-rays with shorter wavelength.
●● What does kVp represent?
Answer: The maximum or peak voltage of an alternating current.
●● When low kilovoltage peak settings are used (65 kVp to 70 kVp), a
film with ____ contrast will result.
Answer: high contrast
●● The quantity of the x-rays produced is controlled by what factor?
Answer: mAs (milliamperage)
●● An increase in density comes from an increase in what other factor?
Answer: kVP or mAs
●● According to the inverse square law, the intensity of radiation is ____
proportional to the ____ from the source of radiation.
Answer: inversely; square of the distance
●● According to the inverse square law, if the length of the PID is
doubled, the resultant beam is ____ as intense.
Answer: one quarter
, ●● What feature do aluminum filters provide to the tube head?
Answer: Reduce the intensity of the x-ray beam.
●● ____ refers to the quantity of radiation received or the total amount
of radiation energy absorbed.
Answer: Total Dose
●● Which of the following are considered to be radioresistant tissues?
Answer: A. Bone Marrow
B. Salivary Glands
C. Lymph Tissue
D. Intestines
Salivary glands
●● Which are the critical organs exposed during dental radiographic
procedures in the head and neck region?
Answer: skin, thyroid gland, lens of the eye, and bone marrow.
●● Which unit of measurement is the traditional unit of dose?
Answer: the radiation absorbed dose (RAD)
CERTIFICATION EVALUATION COMPLETE
QUESTIONS AND ANSWERS GRADED A
PLUS
●● What is one of the main reasons that radiographs are considered an
important and necessary part of patient care?
Answer: Many dental diseases are typically discovered only through the
use of dental radiographs.
●● What does the nucleus of an atom contain?
Answer: Protons and neutrons
●● What are photons?
Answer: - bundles of energy without mass or weight
- bundles of energy that travel at the speed of light.
- they are a component of the particle concept of electromagnetic
radiation.
●● When contrasted with the use of 65 kV to 75 kV for dental x-rays,
the use of 85 kV to 100 kV produces _________ x-rays and __________
wavelengths
,Answer: The use of 85 kV to 100 kV for dental x-rays produces more
penetrating dental x-rays with shorter wavelength.
●● What does kVp represent?
Answer: The maximum or peak voltage of an alternating current.
●● When low kilovoltage peak settings are used (65 kVp to 70 kVp), a
film with ____ contrast will result.
Answer: high contrast
●● The quantity of the x-rays produced is controlled by what factor?
Answer: mAs (milliamperage)
●● An increase in density comes from an increase in what other factor?
Answer: kVP or mAs
●● According to the inverse square law, the intensity of radiation is ____
proportional to the ____ from the source of radiation.
Answer: inversely; square of the distance
●● According to the inverse square law, if the length of the PID is
doubled, the resultant beam is ____ as intense.
Answer: one quarter
, ●● What feature do aluminum filters provide to the tube head?
Answer: Reduce the intensity of the x-ray beam.
●● ____ refers to the quantity of radiation received or the total amount
of radiation energy absorbed.
Answer: Total Dose
●● Which of the following are considered to be radioresistant tissues?
Answer: A. Bone Marrow
B. Salivary Glands
C. Lymph Tissue
D. Intestines
Salivary glands
●● Which are the critical organs exposed during dental radiographic
procedures in the head and neck region?
Answer: skin, thyroid gland, lens of the eye, and bone marrow.
●● Which unit of measurement is the traditional unit of dose?
Answer: the radiation absorbed dose (RAD)
